Reinforced concrete construction.



PATENTED MAR. 5, 1907.

W. GURLETT. REINFORCED CONCRETE CONSTRUCTION.

APPLICATION FILED 0OT.29. 1906.

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RlElNFOFtGED @NCRETEE GQhliEJl'RUQ'l'EQNH Specification of Letters Patent.

Patented March 5, 1907.

Application filed October 29, 1906. Serial No. 341,087.

.To all whom it Tnay concern:-

Be it known that 1, WILLIAM CURLETT, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Reinforced Concrete Construction, of which the following is a specification.

My invention pertains to reinforced concrete constructions; and it contemplates the provision for use in such a construction of a reinforcing-bar of metal or other material compatible with its function, constructed with a view of forming a bond between'bar and concrete and of holding itself against endwise movement in either direction in the concrete, while at the same time tending to prevent disintegration of the concreteand in that way lending strength and durability to the same.

Other objects and advantages of the invention will be fully understood from the following description and claim when til 6 same are read in connection with the accompanying drawings, forming part of this spec fication, in which Figure 1 is a view of a reinforced concrete construction in which the bar constituting the present and preferred embodiment of my invention is employed. Figs. 2 and 3 are rojected views of adjacent surfaces of the ar. taken in the plane indicated by the lined 4, extending through Figs. and Fig. 5 is a perspective view of the reinforcing-bar.

Similar letters designate corresponding parts in all of the views of the drawings, referrin to which-'- A is a body of concrete or analogous material, and B is my novel reinforcing-bar, which may be arranged horizontally, vertically, or otherwise in the concrete, as occasion de' mands. The said bar B is preferably, though not necessarily, made of steel or of metal capable of withstanding considerable we ght and strain, and it is peculiar in that t 18 of double or compound dovetail format1o n that is to say, it is provided at oppos te sides with walls C, which converge in one direction toabrupt shoulders D, while on its other sides, adjacent to those first ment1oned,it has walls E, which are converged in the o posits direction to abrupt shoulders T is ar rangement of the double dovetails of the bar 5 in reverse .order will be better appreciated Fig. 4 is a transverse section of the bar,

when Figs. 2 and 3 of the drawings are compared, and by reference to the said figures it will be apparent that the shoulders F complementary to the dovetails E are arranged in different transverse planes from the shoultails C. From this it follows that the provision of the shoulders F and D at frequent intervals in the length of the bar does not seriously weaken the same, and it also follows that the bar is provided back of the shoulders D with comparatively thick portions G for resisting pressure in one direction and is 'ovided back of the shoulders F with com- "vely thick portions H, calculated to rer ssure in the opposite direction. It also be apparent from the foregoing that ovetails and the abrupt shoulders at the 551%" sides of the bar form interstices or re cesses in which the concrete may rest after that a strong bond is formed between bar and concrete, and casual endwise movement of the barin either direction in the concrete is precluded and at the same time the bar is enabled to lessen the liability of the concrete becoming disintegrated, and hence the strength and durability of the body of concrete are materially enhanced.

While my novel bar is possessed of the advantageous double-dovetail formation described and has the dovetails at adjacent sides arranged in reversed order, it will be appreciated that the said bar is susceptible of being produced almost, if not quite, as easily and cheaply as the reinforcing-bars at present in use.

The construction of bar herein shown and described constitutes the best embodiment of my invention at present known to me but I desire it understood that in practice such changes in the form, construction, and relative arrangement'of the bar may be made as fairly fall within the scope of my invention as claimed.

Having described my invention, what I claim, and desire to secure by Letters Patent, is

A reinforcing-bar for use in concrete and analogous constructions, having at opposite sides shoulders D dis osed at right angles to its length and walls which extend between the shoulders D and each converge in one direction from one shoulder D to the next adjoining shoulder D, and also having at its the manner shown in Fig. 1, with the result I ders D complementary to the opposite doveother sides adjacent to those first-men- In testimony whereof I have hereunto settionei, shoulders F disposed at right angles my hand in presence of two subscribing witto its length and Walls E which extend benesses.

tween the shoulders F and each converge in WILLIAM CURLETT. 5 the opposite direction, with reference to the Witnesses:

walls 0, from one shoulder F to the next ad- C. A. CURLETT,

joining shoulder F. EDWARD G. EISEN. 

